F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
23/342, 252/48,
F01N 3/10 (2006.01) B01D 53/94 (2006.01) B01J 23/89 (2006.01) B01J 37/02 (2006.01) F02B 1/04 (2006.01)
Patent
CA 1125265
ABSTRACT OF THE DISCLOSURE The present invention relates to a three-way catalyst for the purification of exhaust gases from automobiles. Said catalyst comprises as an active substance platinum and rhodium and, when required, base metal(s) in specific ratios by weight between the two noble metals and in a specific atomic ratio between noble metal and base metal, said active substance being deposited on specific amounts of active aluminium oxide containing CeO2, ZrO2 and Fe2O3 and the catalyst being obtained by active aluminium oxide, stabilized with alkaline earth metal when required, is impregnated with a solution of cerium, zirconium and iron salt, whereupon it is tempered in air at 500 to 700°C, and then on applying an impregnating agent comprising salts of the active substance components, it is treated in a current of hydrogen-containing gas at temperatures below 650°C.
346271
Bozon Alfred
Koberstein Edgar
Lakatos Eduard
Pletka Hans-Dieter
Volker Herbert
Aktiengesellschaft Degussa
Marks & Clerk
LandOfFree
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